Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Cruise Control: Diagnosis/Coding: Notes
Diagnosis of the GR II system is carried out with the DISplus/GT-1. On vehicles which have a cruise control module, the control module stores faults that occur with the input/output signals for cruise control operation.
Vehicle which use electronic throttle control will store system related faults in the EML or DME control module.
The MFL or MFL-CM stores faults that occur with the cruise control switch.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.